CSG Remix: Slugforce Puzzler

Become the master of managing slugs and deliver the required weapon parts to the cannon, helping out against the hordes of enemies assaulting humanity. Use your brain power to assess the the right conditions and manage to deliver what is asked of you. Multiple parts, changing tracks, upgrade stations and trash bins all stand in your way of glory. Is what we would say but the position of a logistics manager is never glorious, it is important work, but never celebrated as the heroes of war. Puzzle...